assert - Provides a set of assertion tests

• buffer - Handles binary data

• child_process - Runs child processes

• cluster - Splits a single Node process into multiple processes

• crypto - Handles OpenSSL cryptographic functions

• dgram - Provides implementation of UDP datagram sockets

• dns - Performs DNS lookups and name resolution functions

• domain - Deprecated, used to handle unhandled errors

• events - Handles events

• fs - Interacts with the file system

• http - Creates HTTP servers and clients

• https - Creates HTTPS servers and clients

• net - Creates TCP servers and clients

• os - Provides information about the operating system

• path - Handles file paths

• punycode - Deprecated, a character encoding scheme

• querystring - Handles URL query strings

• readline - Handles readable streams one line at a time

• stream - Handles streaming data

• string_decoder - Decodes buffer objects into strings

• timers - Executes a function after a given number of milliseconds

• tls - Implements TLS and SSL protocols

• tty - Provides classes used by a text terminal

• url - Parses URL strings

• util - Provides utility functions

• v8 - Accesses information about the V8 JavaScript engine

• vm - Compiles JavaScript code in a virtual machine

• zlib - Compresses or decompresses files

• assert/strict - Provides a set of strict assertion tests

• async_hooks - Provides an API to track asynchronous resources

• console - Provides a simple debugging console

• constants - Provides various constants

• diagnostics_channel - Provides an API for creating diagnostic channels

• dns/promises - Provides promises-based DNS lookup functions

• fs/promises - Provides promises-based file system API

• http2 - Provides an implementation of the HTTP/2 protocol

• inspector - Provides an interface to the V8 inspector

• inspector/promises - Provides promises-based inspector API

• module - Provides functions related to modules

• perf_hooks - Provides performance measurement APIs

• readline/promises - Provides promises-based readline API

• repl - Provides a Read-Eval-Print-Loop (REPL) interface

• stream/consumers - Provides stream consumers

• stream/promises - Provides promises-based stream API

• stream/web - Provides web streams API

• sys - Provides system-level utilities (deprecated, use util instead)

• timers/promises - Provides promises-based timer API

• trace_events - Provides an interface for recording trace events

• util/types - Provides utilities for type checking

• wasi - Provides the WebAssembly System Interface API

• worker_threads - Provides a way to create multithreaded Node.js applications